Wallace did not know the girl, who was with her mother at the store, police reported earlier. He picked her out of a shopping cart.
The district attorney told The Oklahoman on Friday that Midwest City police officers saved the child's life. He said Wallace obviously was mentally ill.
Police reported finding a notebook and three-ring binder with religious writings in Wallace's Midwest City apartment after the shooting. Police reported Wallace spoke, while holding the girl hostage, about “Illuminati.”
A Midwest City police detective described the “Illuminati” as a satanic cult. Historically, it was the name of a secret society in the 1700s. It also is the name given to a group in a novel by popular author Dan Brown.
The police chief, Clabes, said Friday he expects Huff will return to duty next week.